“trade wars are good, and easy to win,” president donald trump tweeted in march 2018 after imposing sweeping tariffs on us imports of steel and aluminum. the application of a little-known trade remedy sent shockwaves across the metal markets and upended well-established supply chains. The 25% tariff on steel imports to the US appears to have had more impact on company balance sheets and investment decisions than the 10% tariff on aluminum imports. Nonetheless, North American metals markets have been rattled.
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